What order do the vampire accademy books go in?

1. The Awakening

2. The Struggle

3. The Fury

4. Dark Reunion

That's the main series. You don't have to continue on after that, and depending on your age, you're not going to want to read The Return series because it's very mature.

5. The Return: Nightfall

6. The Return: Shadow Souls

7. The Return: Midnight

I haven't read Steefna's Diaries yet, so I can't say if there is a certain maturity level needed for it. . .

8. Stefan's Diaries: Origins

9. Stefan's Diaries: Bloodlust